st: Re: R-SQUARED AND XTGEE

["Sarah A. Mustillo" <smustillo@psych.duhs.duke.edu>]

> > (1) I cannot successfully fit an -xtgee- model (ie, xtgee [depvar]
> > [varlist], family(binomial) link(probit) i(id) t(waves38)). All I get is
> > this error message: "estimates diverging (absolute correlation > 1)
> > r(430);". Uhh? And how can this be got round?
You don't mention what correlation structure you are specifying.  I often 
have this problem when I specify unstructured correlation - which is the 
most general.  If this is the case, you may solve your problem by trying a 
different (appropriate) correlation structure.

Just a thought...

Sarah






Sarah A. Mustillo, Ph.D
Department of Psychiatry and Behavioral Sciences
Duke University School of Medicine
Box 3454
Durham NC 27710

919 687-4686 x231
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